<template>
  <div>
    <!--    面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
<!--    卡片视图区域-->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        show-icon center :closable="false">
      </el-alert>
<!--      步骤条区域-->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm" :rules="addRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader-panel
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange" style="height: 200px">
              </el-cascader-panel>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
<!--            渲染表单的item项-->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals" size='mini'>
                <el-checkbox :label="item" v-for="(item, index) in item.attr_vals" :key="index" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="addGoods" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
<!--    显示大图片的对话框-->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%">
      <img :src="previewPath" alt="" style="width: 100%">
      <span slot="footer" class="dialog-footer">
  </span>
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'Add',
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 100,
        goods_number: 1,
        goods_weight: 1,
        goods_introduce: '',
        goods_cat: [],
        pics: [],
        attrs: []
      },
      addRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ]
      },
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 图片上传的路径
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的请求头header对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewDialogVisible: false,
      // 图片预览路径
      previewPath: ''
    }
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败！')
      }
      this.cateList = res.data
      // console.log(this.cateList)
    },
    // 级联选择器的选中项发生变化 会触发这个函数
    handleChange () {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        // console.log(this.addForm.goods_cat)
      }
    },
    beforeTabLeave (activeName, oldActiveName) {
      // console.log('即将离开的标签页名字：' + oldActiveName)
      // console.log('即将进入的标签页名字：' + activeName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    async tabClicked () {
      if (this.activeIndex === '1') {
        // console.log('动态参数面板')
        const { data: res } = await this.$http.get(`categories/${this.cartId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        this.$message.success('获取动态参数列表成功！')
        // console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length > 0 ? item.attr_vals.split(' ') : []
        })
        this.manyTableData = res.data
        console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cartId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败！')
        }
        this.$message.success('获取静态属性列表成功！')
        this.onlyTableData = res.data
        // console.log(this.onlyTableData)
      }
    },
    // 处理图片的预览效果
    handlePreview (file) {
      // console.log(file)
      // console.log(imgURL)
      // 获取预览图片地址
      this.previewPath = file.response.data.url
      // 显示图片预览对话框
      this.previewDialogVisible = true
    },
    // 处理图片的移除操作
    handleRemove (file) {
      console.log(file)
      // 1.获取要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // console.log(filePath)
      // 2.从pics数组中找到图片对应的索引值
      const i = this.addForm.pics.findIndex(x => {
        return x.pic === filePath
      })
      // 3.通过splice函数 删除图片
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm.pics)
    },
    // 图片上传成功后的操作
    handleSuccess (response) {
      // console.log(response)
      // 图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 将图片信息对象放到pics中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写表单必填项！')
        }
        // 处理添加商品的业务逻辑
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // console.log(form)
        // 动态参数
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        // 静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        // 添加商品
        const { data: res } = await this.$http.post('goods', form)
        // console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        // 跳转到商品列表页面
        await this.$router.push('/goods')
      })
    }
  },
  created () {
    this.getCateList()
  },
  computed: {
    cartId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
  .el-steps {
    margin: 15px 0;
  }
 .el-step__title {
    font-size: 13px;
  }
 .el-checkbox {
   margin: 0 10px 0 0 !important;
 }
 .addGoods {
   margin-top: 15px;
 }
</style>
